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Lynx: fix load LFSR

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tildearrow 2024-11-08 02:00:58 -05:00
parent ec40b72740
commit 7c1d8ef4bb
2 changed files with 11 additions and 10 deletions
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16
src/engine/platform/lynx.cpp
View file

@ -229,8 +229,9 @@ void DivPlatformLynx::tick(bool sysTick) {
}
if (chan[i].std.ex1.had) {
WRITE_LFSR(i, chan[i].std.ex1.val&0xff);
WRITE_OTHER(i, (chan[i].std.ex1.val&0xf00)>>4);
chan[i].lfsr=chan[i].std.ex1.val&0xfff;
chan[i].freqChanged=true;
chan[i].updateLFSR=true;
}
if (chan[i].std.phaseReset.had) {
@ -243,8 +244,8 @@ void DivPlatformLynx::tick(bool sysTick) {
chan[i].samplePos=0;
}
}
WRITE_LFSR(i, 0);
WRITE_OTHER(i, 0);
chan[i].freqChanged=true;
chan[i].updateLFSR=true;
}
}
@ -262,10 +263,9 @@ void DivPlatformLynx::tick(bool sysTick) {
chan[i].sampleFreq=off*parent->calcFreq(chan[i].sampleBaseFreq,chan[i].pitch,chan[i].fixedArp?chan[i].baseNoteOverride:chan[i].arpOff,chan[i].fixedArp,false,2,chan[i].pitch2,chipClock,CHIP_FREQBASE);
if (dumpWrites) addWrite(0xffff0001+(i<<8),chan[i].sampleFreq);
} else {
if (chan[i].lfsr >= 0) {
if (chan[i].updateLFSR) {
WRITE_LFSR(i, (chan[i].lfsr&0xff));
WRITE_OTHER(i, ((chan[i].lfsr&0xf00)>>4));
chan[i].lfsr=-1;
}
if (chan[i].std.duty.had) {
chan[i].duty=chan[i].std.duty.val;
@ -341,8 +341,7 @@ int DivPlatformLynx::dispatch(DivCommand c) {
chan[c.chan].freqChanged=true;
chan[c.chan].note=c.value;
chan[c.chan].actualNote=c.value;
if (chan[c.chan].lfsr<0)
chan[c.chan].lfsr=0;
chan[c.chan].updateLFSR=true;
}
chan[c.chan].active=true;
WRITE_VOLUME(c.chan,(isMuted[c.chan]?0:(chan[c.chan].vol&127)));
@ -365,6 +364,7 @@ int DivPlatformLynx::dispatch(DivCommand c) {
case DIV_CMD_LYNX_LFSR_LOAD:
chan[c.chan].freqChanged=true;
chan[c.chan].lfsr=c.value;
chan[c.chan].updateLFSR=true;
break;
case DIV_CMD_NOTE_OFF_ENV:
case DIV_CMD_ENV_RELEASE:

5
src/engine/platform/lynx.h
View file

@ -45,14 +45,14 @@ class DivPlatformLynx: public DivDispatch {
MikeyDuty duty;
int actualNote, lfsr, sample, samplePos, sampleAccum, sampleBaseFreq, sampleFreq;
unsigned char pan;
bool pcm, setPos;
bool pcm, setPos, updateLFSR;
int macroVolMul;
Channel():
SharedChannel<signed char>(127),
fd(0),
duty(0),
actualNote(0),
lfsr(-1),
lfsr(0),
sample(-1),
samplePos(0),
sampleAccum(0),
@ -61,6 +61,7 @@ class DivPlatformLynx: public DivDispatch {
pan(0xff),
pcm(false),
setPos(false),
updateLFSR(false),
macroVolMul(127) {}
};
Channel chan[4];